“Sixty years ago I knew everything; now I know nothing; education is a progressive discovery of our own ignorance.
Will Durant”

OBRIGADO DEUS PELA VIDA,PROTEGENOS E GUARDANOS DE TODO MAL

AUTOR DO BLOG ENG. ARMANDO CAVERO MIRANDA SAO PAULO BRASIL

terça-feira, 8 de abril de 2014

A Versatile Method for MOSFET Commutation Analysis in Switching Power Converter Design

A Versatile Method for MOSFET CommutationAnalysis in Switching Power Converter DesignGiulia Di Capua, Student Member, IEEE, and Nicola Femia, Senior Member, IEEE
Abstract—This paper discusses a novel method for the analysisof MOSFET commutations and the investigation of related lossesand spike current issues in the switching power converter (SPC)design. The synchronous rectification switching cell (SRSC) configurationis considered for the investigation, which is used in thehigh-frequency high-efficiency (H2 EF) SPC design. The proposedmethod is aimed at providing an effective tool for quick feasibilityinvestigations and comparative evaluations among design solutionsusing different MOSFET combinations for the design ofH2EF SPCs. The method allows us to use nonlinear models ofinterelectrode MOSFET capacitances and adopts a novel numericaltechnique specifically developed to solve the SRSC model ensuringrobust and fast simulations. Capacitive pulsating currentscirculating through the MOSFETs and the SPC during commutationscan be analyzed in detail by using the proposed method.Different examples are discussed to show how MOSFETs characteristicsand operating conditions may affect switching losses,because of the pulsing currents circulation through the SPC.